The RB-DSD8 8 channel silence switcher accepts analogue and digital inputs and acts as a single 8 channel silence detector, or as multiple smaller stereo silence detectors, allowing silence switchover for 5.1 & 7.1 signals. Designed to switch from one input (or set of inputs) to another in the event of loss of audio, the unit is ideal at transmitter sites, or after the master output of a studio, to switch in another audio source, or simultaneous broadcast, should a master source fail. The unit can switch on loss of level of the main input, on loss of level on one channel of the main input or on loss of synchronisation lock of a main digital input.